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发明名称
Magnetic sound-powered telephonic unit
摘要
申请公布号
US2536179(A)
申请公布日期
1951.01.02
申请号
US19500154180
申请日期
1950.04.05
申请人
REMCO INDUSTRIES
发明人
HELLER ISAAC
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
地址
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